Eros Phono Pre-amp by Bottlehead
Well it took awhile, but I have finally finished building my Eros and have the results posted. Actually, I finished the preamp some time ago but taking the images and editing them did slow me down a bit. Along with the images there are a few tips on building what turned out to be a great piece of equipment. Eros Phono Preamp Images

Improve Your Existing Audio System With These Free Tips
Learn how to increase the accuracy of your listening, eliminate AC Noise, improve genric and high-end cables and interconnects, make computers, laptops, servers and iPods sound better, get better sound from your speakers with a better room set-up, get cleaner bass and seamless integration from your subwoofer, new found punch/transparency/detail from your speakers, get the most out of tubes, making good turntables much better, and far better mounting for your components. All of this can be found on the Improve Your Existing Audio System with These Free Tips page.

Using a Hard Drive as Your Primary Audio Source Transition to HDD based system is no longer a question of if, but a question of when and how. For everybody. (Lukasz Fikus) With the evolution of digital audio, the low costs of components, and the superior sound quality of audio played back using a computer hard drive as the medium then it is easy to rationalize moving to a non-CD system audio system. Some reasons are:

One hard disk we can store approximately 3000 albums using the FLAC codec or 2000 AIFF

The sound quality from properly configured HDD (Hard Disk Drive) system (HDD as a transport, compared to a CD transport) is better in every aspect. CDs produce jitter, are more prone to read errors, and provide less "bit transparency," etc.

HDD can play high-resolution audio (24-bit/192 KHz) where as a CD plays only 16-bit/44.1 KHz audio

HDD music storage can easily be backed up and protected from theft, fire, damage, etc.

At the heart of each music system is a great DAC - which is independent from music formats, frequencies, resolutions, and problems associated with mechanical CD readers. The DAC makes MUSIC. HDD only serves the data and amplifiers only amplify the sound.

HDD system offers tens of major advantages over CD disc storage, like fast track access, fast album find, advanced search for meta-tags, shuffle function, internet radio, various playlists, quick burn of playlists to the “car system”, music sharing with family members, instant MP3 ripping, serving audio to other computers in the home via wireless, to name just a few.

HDD music servers are not demanding in terms of computing speed or networking. We can recycle old computers and network elements, except the drives themselves. Our oldest laptop in the house can have a second life as our GUI and server. Therefore, a HDD system need not be expensive compared to even mid-priced CD transport.

Building an Audio Server
You have several ways to pursue building your own audio server. We put OS X at the center of our systems for reasons that we will not go into here. One way of putting together a HDD audio system is to build all of the components yourself. A more commone approach is topurchase pre-manufactured audio components. (We will adress both options with the goal of providing you the greatest audio quality at the lowest price.) Once your components are in place then we will show you how to optimize your computer for audio playback. In the end, you will find that for the money you spend you will have an audio system that will blow away comparable systems that cost up to ten times as much, and that CD based systems will not even be in the running. We will begin by building a Monarchy Audio HDD system (using NM24 tube DAC, and a SM-70 MkII monoblock.) We will also build a DIY tube based Bottleand system.
For this projec/experiment Monarchy Audio has put together a specially priced package deal (a NM24 tube DAC and a DIP Combo.).

Browse This Page

-The Audio and Electronics section is for the DIY computer audiophile, the analog audiophile, those interested in home recording, and/or the science of audio. New Pages are being added almost daily/weekly, and then there are the Vacuum Tube pages or pages of interest. I have just added numerous pages on the Fundamentals of Audio...these are must read pages for any audiophile or DIYer. It may just be easier to scroll down the page and see what there is.-The Guitar: Anything and everything pertaining to the guitar, but mostly DIY guitar.-Music: Let the various indexes guide you.-Musicians Health: Maintain optimal physical health.-Problem Solving: Whether DIY, learning to read music, etc., it all involves good problem solving skills and here is one of the best places to start.

It started out as "The Bottlehead Crack Headphone Amp"The
folks at Bottlehead have been producing some excellent kits for the DIYer for years now. The kits come with everything you need except for the solder. Included are detailed instructions on CD (some of the bestout there), a support forum, and customer support. As with all projects, patience is key and you need to take your time. The kit below includes the Crack Headphone Amp, with a Speedball Upgrade Kit. One important component about these kits are the wood cases.

Metal cases create a resonant chamber which will haphazardly
redistribute the high frequencies within the enclosure, thus creating nodes
that are arbitrary in both nature and location. These nodes not only
intermodulate amongst other nodes, but they also reflect off the metal case
itself and are induced back into the filter. In a word: noise. The use of a wood enclosure is remarkably advantageous to audio
performance. Wood enclosures do not reflect; instead, wood tends to
naturally absorb a spectrum of this noisiness which the ear easily
appreciates. Contrary to common belief, it's not an acoustical resonance
issue as much as it is a high frequency absorption spectrum issue. (Lessloss)

Audio and Electronics

DIY Indexes

DIY Electronics is for the beginner as well as the advanced DIYer. Here is where you will learn how to solder not only basic circuits, but also SMD's and IC's. Almost all aspects of DIY electronics are covered, as well as audiophile passive components and audiophile component construction.

DIY Audio Here we address only audio. Almost all pages here are original TEWM pages. For info on audiophile components and certain "How-To's" visit DIY Electronics.

DIY Guitar A lot of links and some original TEWM pages.Fundamentals of Audio The nuts-and-bolts of audio. A total of 38 pages, with a lot of great illustrations.

DIY Audiophile Links This is the most comprehensive link index for DIY audiophile kits, instructions, schematics, computer audiophiles, and more.

DIY Synthesizers A lot of links and some original TEWM pages.DIY Recording To help keep things organized I had to break the recording from the audio index.